Inverse of Zero should return PositiveInfinity (#1540)

fixes #1535

Author: lipchev

CodeGen/Generators/UnitsNetGen/QuantityGenerator.cs

@@ -735,7 +735,7 @@ private void GenerateRelationalOperators()
         /// <returns>The corresponding inverse quantity, <see cref=""{relation.RightQuantity.Name}""/>.</returns>
         public {relation.RightQuantity.Name} Inverse()
         {{
-            return {relation.LeftUnit.PluralName} == 0.0 ? {relation.RightQuantity.Name}.Zero : {relation.RightQuantity.Name}.From{relation.RightUnit.PluralName}(1 / {relation.LeftUnit.PluralName});
+            return {relation.RightQuantity.Name}.From{relation.RightUnit.PluralName}(1 / {relation.LeftUnit.PluralName});
         }}
 ");
                 }

UnitsNet.Tests/CustomCode/AreaTests.cs

@@ -127,7 +127,7 @@ public void ToUnit_GivenSIUnitSystem_ReturnsSIQuantity()
         [Theory]
         [InlineData(-2.0, -0.5)]
         [InlineData(-1.0, -1.0)]
-        [InlineData(0.0, 0.0)]
+        [InlineData(0.0, double.PositiveInfinity)]
         [InlineData(1.0, 1.0)]
         [InlineData(2.0, 0.5)]
         public void InverseReturnsReciprocalArea(double value, double expected)

UnitsNet.Tests/CustomCode/ElectricConductivityTests.cs

@@ -39,7 +39,7 @@ public class ElectricConductivityTests : ElectricConductivityTestsBase
         [Theory]
         [InlineData( -1.0, -1.0 )]
         [InlineData( -2.0, -0.5 )]
-        [InlineData( 0.0, 0.0 )]
+        [InlineData( 0.0, double.PositiveInfinity )]
         [InlineData( 1.0, 1.0 )]
         [InlineData( 2.0, 0.5 )]
         public static void InverseTest( double value, double expected )

UnitsNet.Tests/CustomCode/ElectricResistivityTests.cs

@@ -60,7 +60,7 @@ public class ElectricResistivityTests : ElectricResistivityTestsBase
         [Theory]
         [InlineData( -1.0, -1.0 )]
         [InlineData( -2.0, -0.5 )]
-        [InlineData( 0.0, 0.0 )]
+        [InlineData( 0.0, double.PositiveInfinity )]
         [InlineData( 1.0, 1.0 )]
         [InlineData( 2.0, 0.5 )]
         public static void InverseTest( double value, double expected )

UnitsNet.Tests/CustomCode/LengthTests.cs

@@ -229,7 +229,7 @@ public void ToUnit_GivenSIUnitSystem_ReturnsSIQuantity()
         [Theory]
         [InlineData(-1.0, -1.0)]
         [InlineData(-2.0, -0.5)]
-        [InlineData(0.0, 0.0)]
+        [InlineData(0.0, double.PositiveInfinity)]
         [InlineData(1.0, 1.0)]
         [InlineData(2.0, 0.5)]
         public static void InverseReturnsReciprocalLength(double value, double expected)

UnitsNet.Tests/CustomCode/ReciprocalAreaTests.cs

@@ -40,7 +40,7 @@ public class ReciprocalAreaTests : ReciprocalAreaTestsBase
         [Theory]
         [InlineData(-2.0, -0.5)]
         [InlineData(-1.0, -1.0)]
-        [InlineData(0.0, 0.0)]
+        [InlineData(0.0, double.PositiveInfinity)]
         [InlineData(1.0, 1.0)]
         [InlineData(2.0, 0.5)]
         public void InverseReturnsArea(double value, double expected)

UnitsNet.Tests/CustomCode/ReciprocalLengthTests.cs

@@ -41,7 +41,7 @@ public class ReciprocalLengthTests : ReciprocalLengthTestsBase
         [Theory]
         [InlineData(-1.0, -1.0)]
         [InlineData(-2.0, -0.5)]
-        [InlineData(0.0, 0.0)]
+        [InlineData(0.0, double.PositiveInfinity)]
         [InlineData(1.0, 1.0)]
         [InlineData(2.0, 0.5)]
         public static void InverseReturnsLength(double value, double expected)